Ophiuroids (Echinodermata) of southern Chile and the Antarctic: taxonomy, biomass, diet and growth of dominant species

This study aims on a first comparison of the shallow water (< 550 m) ophiuroid fauna of the Magellan region and the high-Antarctic Weddell Sea. Five species are common to both the Magellan region (22 species) and the Weddell Sea (42 species). The most abundant Magellan species is Ophiuroglypha ly...

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Bibliographic Details
Published in:Scientia Marina
Main Author: Corinna Dahm
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 1999
Subjects:
ophiuroids
biomass
diet
growth
age
Aquaculture. Fisheries. Angling
SH1-691
Antarctic
The Antarctic
Weddell Sea
Weddell
Antarc*
Online Access:https://doi.org/10.3989/scimar.1999.63s1427
https://doaj.org/article/646db8b332394ea4b3945571d0f47386
Description
Summary:This study aims on a first comparison of the shallow water (< 550 m) ophiuroid fauna of the Magellan region and the high-Antarctic Weddell Sea. Five species are common to both the Magellan region (22 species) and the Weddell Sea (42 species). The most abundant Magellan species is Ophiuroglypha lymani, contributing 33% to total ophiuroid abundance and 44% to total ophiuroid biomass. The diets of O. lymani and of three closely related (same sub-family Ophiurinae) also dominant, Antarctic species are similar, indicate however slightly different feeding strategies. The Magellan species tends more towards microphageous grazing, whereas the Weddell Sea species act more like scavengers. Within the sub-family Ophiurinae growth performance of O. lymani is higher than in Antarctic species and in the range of boreal species.

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